Stainless steel spring clamps to keep your rear cross spring in alignment. Works with all brands of leaf springs. To determine which spring clamp will fit your application, use a tape measure, ruler or caliper to measure the width of the main spring leaf (not length of leaf or leaf thickness) and order the spring clamps for that width. The 2-1/4" wide springs were normally found on the rear of early Fords. Stainless steel Hex head - 7/16" Wrench 1/4"-10 thread pitch Under-head bolt length - 2.95